Atrichim.] BRYACE^. 255 



persisting upon the capsule until rijDe : capsule oval-oblong, 

 horizontal, inclined or pendent, furrowed and erect when dry ; 

 lid orange ; segments appendiculate. — Muse. Frond, i. 84, 

 t. 31 ; Bryol. Eur. t. 407. T. cucidlata, Michx. Fl. Bor.-Am. 

 ii. 304. 



Hab. Wet shaded banks, in woods; plains and mountains; not rare. 



T. cucidlata, Michx., differs from the normal form in the pedicels of 

 the antheridia a little shorter. It is an American variety. 



2. T. Austriaca, Hedw. Dioecious : plants stronger and 

 longer : leaves with a longer clasping dirty yellow base, more 

 solid, yellowish green, shining, serrate downward to the sheath- 

 ing border ; perigonial leaves clustered into a long sheath, 

 spreading at the apex : antheridia longer, shorter-pedicellate : 

 capsule on a long-pedicel, hoi'izontal, oval-oblong, with a longer 

 collum, more solid, brown-striate, more distinctly costate when 

 dry ; lid highly convex, mamillate, orange-colored ; teeth longer ; 

 segments punctulate, not appendiculate. — Spec. Muse. 176, 

 t. 42 ; Bryol. Eur. t. 408. 

 Hab. Rocky Mountains of Colorado {E. Hall, Doionie). 



Tribe XIV. POLYTRICHE^. 



Plants very variable in size and appearance, of woody or 

 strong texture, often covering Avide surfaces, dividing by basilar 

 innovations, or rarely from the apex, or in male plants from the 

 centre of the flowers. Leaves very solid, with an enlarged 

 costa, generally lamellate on the inside and with a thick sei'rate 

 margin. Flowers dioecious, rarely monoecious or bisexual ; 

 vaginule long. Calyptra cucullate, naked, spinulose or villous, 

 often covered with long pendent hairs reaching to below the 

 capsule. Capsule long-pedicellate, erect or cernuous, cylindri- 

 cal or angular. Peristome simple, rarely none ; teeth 32 or 64, 

 rarely 16, linguiform, solid, confluent at base, formed of a mul- 

 tiple stratum of thick-walled cells, their points adherent to the 

 disk-like apex of the columella. Spores very small. 



93. ATRICHUM, Beauv. (PI. 3.) 

 Densely gregarious or cespitose. Leaves not sheathing at 

 base, Ungulate, undulate-crispate or twisted when dry, very 



